diff options
Diffstat (limited to 'src/modules/module-filter-heuristics.c')
| -rw-r--r-- | src/modules/module-filter-heuristics.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/modules/module-filter-heuristics.c b/src/modules/module-filter-heuristics.c new file mode 100644 index 00000000..222787fc --- /dev/null +++ b/src/modules/module-filter-heuristics.c @@ -0,0 +1,217 @@ +/*** + This file is part of PulseAudio. + + Copyright 2011 Colin Guthrie + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of the License, + or (at your option) any later version. + + PulseAudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <pulse/xmalloc.h> + +#include <pulsecore/macro.h> +#include <pulsecore/hook-list.h> +#include <pulsecore/core.h> +#include <pulsecore/core-util.h> +#include <pulsecore/sink-input.h> +#include <pulsecore/modargs.h> + +#include "module-filter-heuristics-symdef.h" + +#define PA_PROP_FILTER_APPLY_MOVING "filter.apply.moving" +#define PA_PROP_FILTER_HEURISTICS "filter.heuristics" + +PA_MODULE_AUTHOR("Colin Guthrie"); +PA_MODULE_DESCRIPTION("Detect when various filters are desirable"); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(TRUE); + +static const char* const valid_modargs[] = { + NULL +}; + +struct userdata { + pa_core *core; + pa_hook_slot + *sink_input_put_slot, + *sink_input_move_finish_slot, + *source_output_put_slot, + *source_output_move_finish_slot; +}; + +static pa_bool_t role_match(pa_proplist *proplist, const char *role) { + const char *ir; + char *r; + const char *state = NULL; + + if (!(ir = pa_proplist_gets(proplist, PA_PROP_DEVICE_INTENDED_ROLES))) + return FALSE; + + while ((r = pa_split_spaces(ir, &state))) { + + if (pa_streq(role, r)) { + pa_xfree(r); + return TRUE; + } + + pa_xfree(r); + } + + return FALSE; +} + +static pa_hook_result_t process(struct userdata *u, pa_object *o, pa_bool_t is_sink_input) { + const char *want, *stream_role; + pa_proplist *pl, *parent_pl; + + if (is_sink_input) { + pl = PA_SINK_INPUT(o)->proplist; + parent_pl = PA_SINK_INPUT(o)->sink->proplist; + } else { + pl = PA_SOURCE_OUTPUT(o)->proplist; + parent_pl = PA_SOURCE_OUTPUT(o)->source->proplist; + } + + /* If the stream already specifies what it must have, then let it be. */ + if (!pa_proplist_gets(pl, PA_PROP_FILTER_HEURISTICS) && pa_proplist_gets(pl, PA_PROP_FILTER_APPLY)) + return PA_HOOK_OK; + + want = pa_proplist_gets(pl, PA_PROP_FILTER_WANT); + if (!want) { + /* This is a phone stream, maybe we want echo cancellation */ + if ((stream_role = pa_proplist_gets(pl, PA_PROP_MEDIA_ROLE)) && pa_streq(stream_role, "phone")) + want = "echo-cancel"; + } + + /* On phone sinks, make sure we're not applying echo cancellation */ + if (role_match(parent_pl, "phone")) { + const char *apply = pa_proplist_gets(pl, PA_PROP_FILTER_APPLY); + + if (apply && pa_streq(apply, "echo-cancel")) { + pa_proplist_unset(pl, PA_PROP_FILTER_APPLY); + pa_proplist_unset(pl, PA_PROP_FILTER_HEURISTICS); + } + + return PA_HOOK_OK; + } + + if (want) { + /* There's a filter that we want, ask module-filter-apply to apply it, and remember that we're managing filter.apply */ + pa_proplist_sets(pl, PA_PROP_FILTER_APPLY, want); + pa_proplist_sets(pl, PA_PROP_FILTER_HEURISTICS, "1"); + } + + return PA_HOOK_OK; +} + +static pa_hook_result_t sink_input_put_cb(pa_core *core, pa_sink_input *i, struct userdata *u) { + pa_core_assert_ref(core); + pa_sink_input_assert_ref(i); + pa_assert(u); + + return process(u, PA_OBJECT(i), TRUE); +} + +static pa_hook_result_t sink_input_move_finish_cb(pa_core *core, pa_sink_input *i, struct userdata *u) { + pa_core_assert_ref(core); + pa_sink_input_assert_ref(i); + pa_assert(u); + + /* module-filter-apply triggered this move, ignore */ + if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_APPLY_MOVING)) + return PA_HOOK_OK; + + return process(u, PA_OBJECT(i), TRUE); +} + +static pa_hook_result_t source_output_put_cb(pa_core *core, pa_source_output *i, struct userdata *u) { + pa_core_assert_ref(core); + pa_source_output_assert_ref(i); + pa_assert(u); + + return process(u, PA_OBJECT(i), FALSE); +} + +static pa_hook_result_t source_output_move_finish_cb(pa_core *core, pa_source_output *i, struct userdata *u) { + pa_core_assert_ref(core); + pa_source_output_assert_ref(i); + pa_assert(u); + + /* module-filter-apply triggered this move, ignore */ + if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_APPLY_MOVING)) + return PA_HOOK_OK; + + return process(u, PA_OBJECT(i), FALSE); +} + +int pa__init(pa_module *m) { + pa_modargs *ma = NULL; + struct userdata *u; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments"); + goto fail; + } + + m->userdata = u = pa_xnew(struct userdata, 1); + + u->core = m->core; + + u->sink_input_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], PA_HOOK_LATE-1, (pa_hook_cb_t) sink_input_put_cb, u); + u->sink_input_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_FINISH], PA_HOOK_LATE-1, (pa_hook_cb_t) sink_input_move_finish_cb, u); + u->source_output_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], PA_HOOK_LATE-1, (pa_hook_cb_t) source_output_put_cb, u); + u->source_output_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FINISH], PA_HOOK_LATE-1, (pa_hook_cb_t) source_output_move_finish_cb, u); + + pa_modargs_free(ma); + + return 0; + +fail: + pa__done(m); + + if (ma) + pa_modargs_free(ma); + + return -1; + + +} + +void pa__done(pa_module *m) { + struct userdata* u; + + pa_assert(m); + + if (!(u = m->userdata)) + return; + + if (u->sink_input_put_slot) + pa_hook_slot_free(u->sink_input_put_slot); + if (u->sink_input_move_finish_slot) + pa_hook_slot_free(u->sink_input_move_finish_slot); + if (u->source_output_put_slot) + pa_hook_slot_free(u->source_output_put_slot); + if (u->source_output_move_finish_slot) + pa_hook_slot_free(u->source_output_move_finish_slot); + + pa_xfree(u); + +} |